/...
+import { RouterLink, RouterView } from 'vue-router'
import HelloWorld from './components/HelloWorld.vue'
...
import HelloWorld from './components/HelloWorld.vue'
-import TheWelcome from './components/TheWelcome.vue'
...
    <div class="wrapper">
      <HelloWorld msg="You did it!" />
+
+      <nav>
+        <RouterLink to="/">Home</RouterLink>
+        <RouterLink to="/about">About</RouterLink>
+      </nav>
...
  </header>

-  <main>
-    <TheWelcome />
-  </main>
+  <RouterView />
...
header {
  line-height: 1.5;
+  max-height: 100vh;
...
.logo {
  display: block;
  margin: 0 auto 2rem;
}

+nav {
+  width: 100%;
+  font-size: 12px;
+  text-align: center;
+  margin-top: 2rem;
+}
+
+nav a.router-link-exact-active {
+  color: var(--color-text);
+}
+
+nav a.router-link-exact-active:hover {
+  background-color: transparent;
+}
+
+nav a {
+  display: inline-block;
+  padding: 0 1rem;
+  border-left: 1px solid var(--color-border);
+}
+
+nav a:first-of-type {
+  border: 0;
+}
+
...
  header .wrapper {
    display: flex;
    place-items: flex-start;
    flex-wrap: wrap;
  }
+
+  nav {
+    text-align: left;
+    margin-left: -1rem;
+    font-size: 1rem;
+
+    padding: 1rem 0;
+    margin-top: 1rem;
+  }
.../
